Plot Data Line Format
A plot data line may contain any number of plot data bytes up to the maximum of 132 for horiF zontal dot density of 60 dpi (Data Processing mode) or 198 bytes for a horizontal dot density of 90 dpi (Correspondence mode). If Auto Line Feed is disabled, any bytes over the maximum are lost. If the maximum is exceeded and Auto Line Feed is enabled, a Line Feed (LF) is forced and the remaining plot data is printed as text on the next line.
The plot mode control code may occur anywhere in the line prior to the line terminator, but plot speed may decrease if it is not at the beginning of the line.
NORMAL DENSITY PLOT
For normal density plot, the plot line contains: Control Code 05 hex, plot data bytes, and a Line Terminator (0A hex or 0C hex). The control sequence for sending the
1.Send the plot command code ENQ (05 hex).
2.Send the plot data bytes (refer to NO TAG on page NO TAG).
3.Send a line terminator, either a Line Feed (LF, 0A hex) or a Form Feed (FF, 0C hex). A Carriage Return (CR) may also be used instead of the LF code, provided the Carriage Return has been configured for Carriage Return = Carriage Return + Line Feed (CR = CR + LF).
a.A line feed (0A hex) used as the line terminator causes the contents of the buffer to be plotted and the paper advances a single dot row, based on the vertical density of the current mode.
b.A form feed (0C hex) used as the line terminator causes the contents of the buffer to be plotted and the paper to advance to the top of the next form.
4.Regardless of which line terminator code is sent, the printer will default to the previously selected print mode unless further plot control codes are provided with the data.
NOTE: Failure to adhere to this format may cause unexpected results.
DOUBLE DENSITY PLOT
For double density plot, the plot line contains: Control Code 04 hex, plot data bytes, a Line Terminator (0A hex or 0C hex), Control Code 05 hex, plot data bytes, and a Line Terminator. The control sequence for sending
1.Send the even dot plot control code EOT (04 hex), followed by plot data bytes (refer to NO TAG on page NO TAG).
2.Send a line terminator, which causes the printer to plot the data bytes; the paper is not advanced in Double Density Plot; the printer now waits for the second plot command and plot data bytes.
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